V-Lab
YPF SA Spline ILLIQ Liquidity Analysis
Illiquidity prediction for Wednesday, September 30th, 2026
1 Day
333.10
increased by 3.93
1 Week
310.93
decreased by 18.24
1 Month
324.10
decreased by 5.07
Analysis last updated: Tuesday, September 29, 2026 at 09:57 PM UTC
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News Impact Curve
How returns affect tomorrow's illiquidityIlliquidity Forecast
How illiquidity evolves over timeParameter Estimates
Jun 29, 1993 to Sep 25, 2026Model Insight
With persistence 0.999, illiquidity shocks have a half-life of 823 trading days (~3.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
ILLIQ-SMEM Model
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High persistence: persistence 0.999, shock half-life ~823 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.7832 | 4.50*** |
| αARCH | 0.1334 | 14.61*** |
| βGARCH | 0.8658 | 93.65*** |
Spline Coefficients
K=10
| γ1 | -0.2194 | -1.17 |
| γ2 | 0.9788 | 3.00*** |
| γ3 | -1.4822 | -5.06*** |
| γ4 | 0.9323 | 4.41*** |
| γ5 | -0.4150 | -2.82*** |
| γ6 | 0.3594 | 2.00** |
| γ7 | -0.2428 | -0.97 |
| γ8 | 0.5181 | 1.35 |
| γ9 | -1.2025 | -1.80* |
| γ10 | 1.6401 | 1.68* |
0.999
Persistence823d
Half-lifeμ
ILLIQ-SMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.7832 | 4.50*** |
α ARCH Response to squared shocks | 0.1334 | 14.61*** |
β GARCH Volatility persistence | 0.8658 | 93.65*** |
Spline Coefficients
K=10
| γ1 | -0.2194 | -1.17 |
| γ2 | 0.9788 | 3.00*** |
| γ3 | -1.4822 | -5.06*** |
| γ4 | 0.9323 | 4.41*** |
| γ5 | -0.4150 | -2.82*** |
| γ6 | 0.3594 | 2.00** |
| γ7 | -0.2428 | -0.97 |
| γ8 | 0.5181 | 1.35 |
| γ9 | -1.2025 | -1.80* |
| γ10 | 1.6401 | 1.68* |
Persistence:
0.999
Half-life:
823 days
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